This patch implements the PCI transport version of iommu_enabled. This
is done by comparing the address space returned by
pci_device_iommu_address_space() against address_space_memory.
Note that an ideal approach is to use pci_device_iommu_address_space()
in get_dma_as(), but it might not work well since the IOMMU could be
initialized after the virtio-pci device is initialized.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Message-Id: <
20210804034803.1644-3-jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
return pci_get_address_space(dev);
}
+static bool virtio_pci_iommu_enabled(DeviceState *d)
+{
+ VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
+ PCIDevice *dev = &proxy->pci_dev;
+ AddressSpace *dma_as = pci_device_iommu_address_space(dev);
+
+ if (dma_as == &address_space_memory) {
+ return false;
+ }
+
+ return true;
+}
+
static bool virtio_pci_queue_enabled(DeviceState *d, int n)
{
VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
k->ioeventfd_enabled = virtio_pci_ioeventfd_enabled;
k->ioeventfd_assign = virtio_pci_ioeventfd_assign;
k->get_dma_as = virtio_pci_get_dma_as;
+ k->iommu_enabled = virtio_pci_iommu_enabled;
k->queue_enabled = virtio_pci_queue_enabled;
}